Go Back   Aquarium Advice - Aquarium Forum Community > Freshwater > Freshwater & Brackish - General Discussion
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 05-22-2012, 05:55 PM   #1
Aquarium Advice Freak
 
bobc4d's Avatar
 
Join Date: Apr 2012
Location: college station
Posts: 238
why is the bottom of aquariums glass?

why is the bottom of an aquarium glass? why isn't it metal or something unbreakable? along the same vein, how much weight will the bottom glass take?
__________________

__________________
bobc4d is offline   Reply With Quote
Old 05-22-2012, 06:20 PM   #2
Aquarium Advice Addict
 
Rutrag's Avatar
 
Join Date: Jul 2011
Location: Richmond, VA
Posts: 1,133
Metal can corrode, leach the corrosion into the water, and can be dented. There's also the problem of bonding it to something clear. For home aquariums, I imagine the weight plus the prep to make it fish and invert safe could be cost prohibitive.

Long ago glass tanks had slate bottoms and were inside a metal frame. I had a 15 gallon slate bottom I found at a LFS I used to work at. I bet it weighed 40 pounds empty.

The way your basic all glass aquarium is made, the weight of the water pressing on the bottom glass actually transfers through to the outside edges of the tank. (The bottom glass is recessed.). It's cheap to manufacture and pretty durable.

The bottom glass is pretty strong and can accept a lot of weight so long as it's not shock loaded or point loaded.
__________________

__________________
It is a violation of federal law to use this product in a manner inconsistent with its labelling.
Rutrag is offline   Reply With Quote
Old 05-22-2012, 06:23 PM   #3
Aquarium Advice Activist
 
Regz8000's Avatar
 
Join Date: Apr 2011
Posts: 142
Glass=watertight
Wood=leaks
Metal=rust
Plastic=watertight

It will hold a lot of weight and also if you have egg crate on the bottom of your aquarium it spreads the impact
Hope i helped
__________________
Regz8000 is offline   Reply With Quote
Old 05-22-2012, 06:26 PM   #4
Aquarium Advice Activist
 
Regz8000's Avatar
 
Join Date: Apr 2011
Posts: 142
Quote:
Originally Posted by Rutrag
Metal can corrode, leach the corrosion into the water, and can be dented. There's also the problem of bonding it to something clear. For home aquariums, I imagine the weight plus the prep to make it fish and invert safe could be cost prohibitive.

Long ago glass tanks had slate bottoms and were inside a metal frame. I had a 15 gallon slate bottom I found at a LFS I used to work at. I bet it weighed 40 pounds empty.

The way your basic all glass aquarium is made, the weight of the water pressing on the bottom glass actually transfers through to the outside edges of the tank. (The bottom glass is recessed.). It's cheap to manufacture and pretty durable.

The bottom glass is pretty strong and can accept a lot of weight so long as it's not shock loaded or point loaded.
Ive. Never seen a slate bottom !!!! How cool is that! Don't make em now which is a shame
__________________
Regz8000 is offline   Reply With Quote
Old 05-22-2012, 06:39 PM   #5
Aquarium Advice Freak
 
Join Date: Apr 2012
Location: aprox 30 minutes from The Wet Spot :)
Posts: 287
Quote:
Originally Posted by bobc4d View Post
why is the bottom of an aquarium glass? why isn't it metal or something unbreakable? along the same vein, how much weight will the bottom glass take?
The thing to remember is that you have the water dispersed over the entire bottom of the tank and it's not just in one spot.

You could do the math to figure out how much a gallon of water weighs, figure out the square inches for the bottom of your tank to determine the actual weight per square inch.

My tank is 48 x 13 or 624 square inches ( 40gal ) I have substrate at 70lbs, and lets say that it displaced 5 gallons of water.

A gl of water is 8.34 lbs so 35x8.34 = 291.90 +70 lbs = 361.9

That's my total weight with water and substrate. So 361.9 / 624 sq inches is 0.58 lbs per square inch.

When you take into effect that the glass is usually tempered, and depending on it's thickness, it's a very good choice as well as economical for the manufacturer.
__________________
---------------------------------------------------

Your tank cannot be complete without a pleco. It's IMPOSSIBLE.
Scott F is offline   Reply With Quote
Reply

Tags
bottom, glass

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off








» Photo Contest Winners







All times are GMT -4. The time now is 08:18 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.